Title :
Application of Quad Tree for low bitrate compression
Author :
Varma, K. C Ravi Chandra ; Parthasarathy, Sudharsan ; Sankaran, Praveen
Author_Institution :
Dept. of Electron. & Commun. Eng., Nat. Inst. of Technol. Calicut, Calicut, India
Abstract :
Quad Tree algorithm is an efficient method for image compression at lower bit rates. It divides the image into four equal quadrants based on a threshold. The threshold is chosen from image characteristics using Otsu thresholding method. The image regions obtained from the Quad Tree decomposition are approximated by using a first order polynomial. Polynomial approximation coefficients now represent the pixel values. Its performance is better than JPEG at lower bitrates.
Keywords :
data compression; image coding; polynomial approximation; quadtrees; JPEG; Otsu thresholding method; first order polynomial; image compression; low bitrate compression; polynomial approximation coefficients; quad tree algorithm; quad tree decomposition; Approximation methods; Bit rate; Image coding; Mathematical model; PSNR; Polynomials; Otsu Thresholding; Polynomial approximation of image; Quad Tree decomposition;
Conference_Titel :
Computational Intelligence and Signal Processing (CISP), 2012 2nd National Conference on
Conference_Location :
Guwahati, Assam
Print_ISBN :
978-1-4577-0719-3
DOI :
10.1109/NCCISP.2012.6189687
